Question

2．下面各題寫(xiě)出必要的計(jì)算過(guò)程．

$\frac{4}{15}$×75	$\frac{7}{18}$×$\frac{9}{14}$	$\frac{7}{18}$×$\frac{9}{14}$
$\frac{11}{14}$×$\frac{7}{10}$×$\frac{8}{33}$	$\frac{3}{5}$×$\frac{5}{27}$×$\frac{3}{8}$	$\frac{4}{5}$×$\frac{5}{8}$×$\frac{5}{12}$．

Answer 1

分析 根據(jù)分?jǐn)?shù)乘法運(yùn)算的計(jì)算法則計(jì)算即可求解．

解答 解：$\frac{4}{15}$×75=20

$\frac{7}{18}$×$\frac{9}{14}$=$\frac{1}{4}$

$\frac{7}{18}$×$\frac{9}{14}$=$\frac{1}{4}$

$\frac{11}{14}$×$\frac{7}{10}$×$\frac{8}{33}$
=$\frac{11}{20}$×$\frac{8}{33}$
=$\frac{2}{15}$

$\frac{3}{5}$×$\frac{5}{27}$×$\frac{3}{8}$
=$\frac{1}{9}$×$\frac{3}{8}$
=$\frac{1}{24}$

$\frac{4}{5}$×$\frac{5}{8}$×$\frac{5}{12}$
=$\frac{1}{2}$×$\frac{5}{12}$
=$\frac{5}{24}$

點(diǎn)評(píng) 考查了分?jǐn)?shù)乘法運(yùn)算，關(guān)鍵是熟練掌握計(jì)算法則正確進(jìn)行計(jì)算．